I myself have trouble with RC, so I do some searches during my spared time. Here is a site I think some can use.
http://www.beatthegmat.com/how-to-understand-and-remember-author-s-flow-of-thoughts-t20692.html
http://www.beatthegmat.com/how-to-understand-and-remember-author-s-flow-of-thoughts-t20692.html